Nickie - It is very important to try to identify when the change in his demeanor occurred and what was happening around that time. While you may be right that he is experiencing depression and/or anxiety, knowing the causes can be important in determining the proper treatment. If he has not been seen by a mental health professional you may want to encourage him to do so in order to determine if medication is necessary.

Prozac might turn out to be quite helpful but as Suffolk pointed out it could be 3 weeks or more before the full effects might be apparent. Fortunately, some folks experience some benefits earlier than three weeks and you might notice an improvement in his temper within the first 10 - 14 days.

Rick Wirtz

Rick Wirtz is a Psychologist, not a Psychiatrist. Although the majority of Psychologists are not authorized to prescribe medications or give you specific advice about them, they typically have experience working with patients who take a variety of medications. The response above is not intended to diagnose or treat any medical or mental disorder. Any information given in a post about medication is for educational purposes only and primarily to aid you in having an informed discussion with your own physician